Example

Algorithm

The following algorithm is based on the algorithm derived by the German
mathematician Gauss. The principal simplification is that substitutions have been made for the
case of Julian calendars and Orthodox Easters. This algorithm calculates the number of days
AFTER March 21 (Julian) that Easter occurs.

The number RC ranges from 1 to 35 which corresponds to March 22 to April 25 in the Julian
Calendar (currently April 4 to May 8 on the Gregorian). The Julian Calendar is now 13 days
behind the Gregorian, and will be until March 1, 2100 when it will be 14 days behind the Gregorian Calendar.